This is the quote from your original post that I find odd:
> so they subconsciously collude in cultural movements which make work seem scarce, and life scary and chaotic.
I agree that business owners will offer someone lower wages, because the job they're providing is very stable. (i.e. my friend had a choice between being an assistant manager at a chain sandwich shop, or being a manager of a new restaurant in a different city. He's taken the low-risk option.)
I also agree that there are structures that exist that encourage the drug war to go on. The iron triangle between: Politicians passing drug laws and other harsh criminal laws, DAs who want perfect records, police & prison guards who want more overtime and toys, and the unions that represent police and prison guards and lobby for more laws.
It's the business owner -> drug war link that I find tenuous. I know several business owners, of multi-million dollar companies. They aren't consciously thinking like you say they are, they are simply thinking "who do I need to hire to get this job done".
Admittedly, maybe I need to be talking to the CEO of a company that primarily employs retail or blue-collar workers.
You also make the claim that it's subconscious, so I don't even know how to collect evidence in regards to that...
I don't think your theory is falsifiable. Because you're making conjecture about someone's subconscious, and about a small group, it's nearly impossible to prove or disprove.
What kind of evidence would you need to change your mind?
//edit and I have to give credit to the other replies--- the prison workforce is a great counter-example to why the drug war would be useful from an evil capitalist perspective. I feel embarrassed that I missed that :/